Monday, August 6, 2012

UC2577-ADJ pdf datasheet download Texas Instruments



· Requires Few External Components
· NPN Output Switches 3.0A, 65V(max)
· Extended Input Voltage Range: 3.0V to 40V
· Current Mode Operation for Improved
Transient Response, Line Regulation, and
Current Limiting
· Soft Start Function Provides Controlled
· 52kHz Internal Oscillator
· Output Switch Protected by Current Limit,
Undervoltage Lockout and Thermal
· Improved Replacement for LM2577-ADJ


· Simple Boost and Flyback Converters
· SEPIC Topology Permits Input Voltage to
be Higher or Lower than Output Voltage
· Transformer Coupled Forward Regulators
· Multiple Output Designs


The UC2577-ADJ device provides all the active functions necessary
to implement step-up (boost), flyback, and forward converter
switching regulators. Requiring only a few components, these simple
regulators efficiently provide up to 60V as a step-up regulator,
and even higher voltages as a flyback or forward converter regulator.
The UC2577-ADJ features a wide input voltage range of 3.0V to
40V and an adjustable output voltage. An on-chip 3.0A NPN switch
is included with undervoltage lockout, thermal protection circuitry,
and current limiting, as well as soft start mode operation to reduce
current during startup. Other features include a 52kHz fixed frequency
on-chip oscillator with no external components and current
mode control for better line and load regulation.
A standard series of inductors and capacitors are available from
several manufacturers optimized for use with these regulators and
are listed in this data sheet.

Click here to download Texas Instruments UC2577-ADJ pdf datasheet

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